IQAir OutFlowQuick Overview The IQAir OutFlow is a ducting adaptor that enables an IQAir Air Filtration unit to be used to create a negative or a positive pressure environment with minimal building works. The IQAir Outflow ensures that any air from the negative pressure isolation room has been filtered and therefore is clean before extraction. When used in a positive pressure environment, it ensures the air entering the isolation room is free from contamination.